Inelastic cross sections have been obtained from measurements of sphere transmission for incident neutron energies of 1.0, 4.0, and 4.5 Mev. Cross sections were measured for Al, Fe, Cu, Zn, Ag, Cd, Sn, Au, Pb, and Bi at the three neutron energies. In addition, the carbon inelastic cross section was measured at 1.0 Mev, the Be, C, Ti, Ni, Zr, and W cross sections were measured at 4.0 Mev, and the Ti, Ni, Zr, and W were measured at 4.5. The cross sections were determined at about ten energy thresholds of the neutron detector to obtain information about the energy spectra of inelastic neutrons. The experimental techniques and the method of evaluating the measurements are discussed. The results of this investigation are compared with other determinations of inelastic cross sections.

• Received 26 January 1955

DOI:https://doi.org/10.1103/PhysRev.98.1216